Discarded fast drill bit
(1) Discarded fast drill bit
(2) Discarded fast drill bit
(3) WD Multifunctional quick drilling
(4) WD Multifunctional quick drilling
(5) SP Discarded fast drill bit
(6) SP Discarded fast drill bit
(7) SP Discarded fast drill bit
(8) SP Discarded fast drill bit
(9) SP Discarded fast drill bit
(10) WC Discarded fast drill bit
(11) WC Discarded fast drill bit
(12) WC Discarded fast drill bit
(13) WC Discarded fast drill bit
(14) WC Discarded fast drill bit
(15) Quick drill bit